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      Question

      The ratio of two numbers is 7 : 5, and their HCF is 6.

      What is their LCM?
      A 252 Correct Answer Incorrect Answer
      B 185 Correct Answer Incorrect Answer
      C 210 Correct Answer Incorrect Answer
      D 122 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      ATQ;
      Let the numbers be 7x and 5x.

      Since the HCF of 7x and 5x is 6, we get x = 6.

      So, the numbers are 42 and 30.

      Hence, LCM of 42 and 30 = 210.

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